Saturday, November 21, 2009

Fast and Hard..........

That was a fast moving storm, but it snowed hard! It only snowed for about 4-5 hours yesterday afternoon, but we pretty much nailed the snow forecast.  Sierra got 7 inches at the base and a foot on top!

Today will stay cold in the 30's and another storm moves into the Pacific NW tonight. Tomorrow we may see a few snow showers as the storm brushes by to our North, but we shouldn't get more than a dusting.

The ridge builds in starting Sunday for a week of quiet weather. The temps should stay cool in the 40's with temps in the 50's at the Lake Wed. and Thanksgiving Day.  A storm system brushing by to our North on Friday will cool the temps back down a bit.

The pattern going into the first week of December will feature a positive PNA, a negative NOA, and a negative AO. This would support shots of cold air coming into the country and a trough locking in over the East as a ridge sits off the West Coast. Normally this would mean we are stuck in a dry pattern, but with El Nino and the MJO progressing Eastward, a typical El Nino pattern of a split jetstream is going to want to form. Several of the model runs have been suggesting this scenario as well.

A ridge is going to try and build into the areas that have been getting hammered the past month by snow, from the Pacific NW up into British Columbia. The Southern branch of the jetstream would then come under the ridge and hammer Central and Southern.  We are right on the Northern edge of the storm track when this pattern sets up. Let's hope that if this pattern does develop going into Dec. that the storm track is far enough North to put us under the gun. BA